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KM3NeT CLBv2

KM3NeT CLBv2. CLBv2. CLBv2-Proto Status Before proceeding to CLBv2-Proto2…. CLBv2_Proto DEMO (Yesterday). Timing Demo (SPEC-DIO / CLBv2) White Rabbit 1 ns accurate See also: http://pi1222.physik.uni-erlangen.de/Electronics/35 Ethernet Demo (Linux PC + Optical Network card / CLBv2)

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KM3NeT CLBv2

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  1. KM3NeT CLBv2

  2. CLBv2 • CLBv2-Proto Status • Before proceeding to CLBv2-Proto2…

  3. CLBv2_Proto DEMO (Yesterday) • Timing Demo (SPEC-DIO / CLBv2) • White Rabbit 1 ns accurate • See also: http://pi1222.physik.uni-erlangen.de/Electronics/35 • Ethernet Demo (Linux PC + Optical Network card / CLBv2) • Ping and basic UDP packet transfer (same as described in https://docs.google.com/a/km3net.de/document/d/1m7cePSND1q4xHkX-Y96CDXsBKivap8j55cWaLbH7mjw/edit) • aap PPS PPS

  4. Near future: timing and Ethernet • White Rabbit Switch • Use switch as is: • no broadcast (yet) • Standard firmware/software 10MHz PPS PPS PPS Timing Reference Grand Master Mode

  5. White Rabbit timing • Determine clock stability • Use a proper master clock • external PPS and 10 MHz reference • 10 MHz Rubidium standard + KC705 as PPS source “= divide by 10.000.000” • SPEC in grand master mode • Or WR Swtich-v3… Sloppy first order measurement: time between PPS (horizontal 20 ps/div)

  6. Before proceeding to CLBv2-Proto2 • Apart from the listing “KM3NeT_ELEC_2014_001_Doc-Prototype_design_changes_ELEC_draft” • Just received a warning possible reset issue with the CDCM61004 (GSI, Stefan Rauch; need to investigate further…) • Electrical issues • Mechanical issues

  7. Electrical Issues • 1 Gbit flash issue • BPI flash instead of SPI flash? • Determine timing margin • Constraints 125 MHz + 10% = 140 MHz (P&R for XC160T-1 of current design seems successful) • Try Slow-Slew rate to suppress noise? • System test • Readout of a complete assembled (½) DOM including PMT’s (needs integrated firmware, embedded & DAQ software, shore station and rudimentary optical network) • Verify: • Throughput • Noise • Form a system test we also learn to setup a proper test procedure • Write a test procedure document • Write test software / Build test equipment • EMI • We did our best to have a clock-enable on the Octopus boards to avoid noise on the PMT bases. • How noisy is the CLBv2? • We don’t want to spoil the 24 bit Piezo ADC (a 144 DB signal/noise ratio!) • This may lead to a mechanical issue (reversing component side of the PCB and/or extra shielding)

  8. Mechanical Issues • Apart from the listing “KM3NeT_ELEC_2014_001_Doc-Prototype_design_changes_ELEC_draft” • Holes around the FPGA to mount an industry standard heat sink? • choose a proper heat-sink • sort out the mechanical structure • Consider alternative SFP location • solve fiber routing issue • try the molex SFP flex rigid, later probably design custom SFP flex rigid to serve our needs. • Get rid of the RJ45 connectors (Piezo & Hydrophone) • Piezo is mounted on the octopus board so this is no longer needed on the CLBv2? • Hydrophone only uses two signals “Clk” and “AES_OUT” plus power. Use a smaller connector and remove RS485 (saves money, power and noise?). • How does the hydrophone fit in mechanically anyhow? • EMI • Verify readout of a complete assembled DOM including PMT’s (needs integrated firmware, embedded & DAQ software, shore station and rudimentary optical network) • Extra shieling needed?

  9. Roadmap towards CLBv2-Proto2 • Firmware integration (WRPC, IPMUX, LM32_2nd, State Machine, TDCs, Hydro, Multi-boot) • Embedded software (+ connection to WR embedded software) • Rudimentary optical network • one point to point link, 2 SFP’s • Note that the Molex SFP tail must be used since the SFP cage will no longer be accessible once the DOM is assembled • Rudimentary shore station (one WR switch V3) • DAQ software • As least 19 PMT’s and bases • 1 Octopus large, 1 Octopus small • Piezo, Hydrophone, Nanobeacon, AHRS • ½ DOM integration • Test & learn!

  10. General remark • There must be knowledge transfer from 7-Solutions to the collaboration. • To my opinion, the best way to do this is to repeated the 7-solutions work at different locations: • All partners gain knowledge (including 7-Solutions) • We have multiple test sites • My first step towards this is to use a WR switch as is and later change firmware/software…

  11. Questions?Discussion…

  12. Backup SlidesMore details…

  13. Clocking PhaseCompensatedClocks

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